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#1 |
Registered Member
Join Date: Sep 2000
Location: rock hill,S.C. 29730
Posts: 420
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![]() Went to 1/8 mi. strip today.
15* timing 40-42# fuel pressure. Only went 9.00 @77.5 My old bolt-on stocker was faster. 8.75 @ 77.6 What's going on?? Tmoss said headers seemed big but It's got tons of tourqe, on the street it seems MUCH faster but 9.00's?? Granted my shifter was hanging up on me and I missed some shifts but on the 3 9.00's (all almost identical) I hit 2 & 3rd pretty good, not powershift fast, but smooth.60 ft's still 1.8-1.9
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88 GT: subs,pullies, 1 3/4 longtubes, flowmasters, AFR 165's,T,F #1 cam,Thyphoon intake, 24# inj., 73mm C&L,65mmT.B., 190LPH pump, Eagle sir rods, forged pistons in a newly rebuilt 306. DYNO TUNED TO 300.97 RWHP 337RWTQ |
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#2 |
Undescribable
Join Date: Sep 1998
Location: Ft Myers Fla
Posts: 1,539
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![]() might wanna try 38-39# of fuel pressure. when i dyno'd my car I had mine up there and had to lower it. i had almost the same combo except i had cobra intake and 1-5/8 longtubes.
what gear? 3.73's 4.10's?
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Rice Haters Club Member #101 |
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#3 |
Registered Member
Join Date: Sep 2000
Location: rock hill,S.C. 29730
Posts: 420
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![]() 3.73's
should I be as afraid as i am about leaning it out that much? The plugs aready look leaner than rich, really light tan almost milky white color on straps.
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88 GT: subs,pullies, 1 3/4 longtubes, flowmasters, AFR 165's,T,F #1 cam,Thyphoon intake, 24# inj., 73mm C&L,65mmT.B., 190LPH pump, Eagle sir rods, forged pistons in a newly rebuilt 306. DYNO TUNED TO 300.97 RWHP 337RWTQ |
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#4 |
Import Slayer
Join Date: May 1999
Posts: 2,241
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![]() Judging from your MPH, your "old bolt on stocker" wasn't any faster than this engine or, at least, didn't make any more power.
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'82 GT 351W (.060)Comp Cams 274* Extreme Energy cam, ported & polished heads w/ 1.94/1.60 valves 10.3:1 flat top pistons,stealth intake, Mallory dizzy,Holley 750dp carb, BBK shorties,Flowmaster exhaust,C-4 with 3700 stall converter, B&M pro shifter,8.8 rear, 4:10's, subframes, electric fan, powermaster alternator, 4 core radiator. |
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#5 |
Rearview Mirror Haze
Join Date: May 1999
Location: Huntsville, Alabama...a.k.a. "HuntsVegas"
Posts: 387
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![]() If you have AFR 165's you should be running an 8.2
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93 lx Notch 01 GT ![]() ...the epitome of Murphy's Law |
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#6 | |
Import Slayer
Join Date: May 1999
Posts: 2,241
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![]() Quote:
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'82 GT 351W (.060)Comp Cams 274* Extreme Energy cam, ported & polished heads w/ 1.94/1.60 valves 10.3:1 flat top pistons,stealth intake, Mallory dizzy,Holley 750dp carb, BBK shorties,Flowmaster exhaust,C-4 with 3700 stall converter, B&M pro shifter,8.8 rear, 4:10's, subframes, electric fan, powermaster alternator, 4 core radiator. |
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#7 | |
Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
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![]() Quote:
Anyways, I run 38 psi of fuel pressure on 24 # injectors and go high 7's @86mph in the 1/8th. Your mph is pretty low and I really,really,really doubt a slight change in fuel pressure is going to help very much at all. Find a dyno and get the bugs worked out.
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92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer |
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#8 | |
Undescribable
Join Date: Sep 1998
Location: Ft Myers Fla
Posts: 1,539
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![]() Quote:
i had 165's tfs stage 1 cam and cobra intake and was in the high 7's. somethings gota be out of whack for it to only run those times. seems to be launching ok with the 1.8-1.9 60' times
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Rice Haters Club Member #101 |
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#9 |
Registered Member
Join Date: Sep 2000
Location: rock hill,S.C. 29730
Posts: 420
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![]() 38#'s high 7's all motor?? HELP ME I figured I'd run 8.20's too and I studied up b-4 I built my combo so I don't get it??
I rechecked my fuel pressure 2-day and it was up to like 45#?? I havn't touched since sun. so I dunno? but if the plugs are not looking rich at 42# would you lean it out more? I looked at 2 of them 2-day and the looked more tan than whiteish as they did at the track on Sun.
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88 GT: subs,pullies, 1 3/4 longtubes, flowmasters, AFR 165's,T,F #1 cam,Thyphoon intake, 24# inj., 73mm C&L,65mmT.B., 190LPH pump, Eagle sir rods, forged pistons in a newly rebuilt 306. DYNO TUNED TO 300.97 RWHP 337RWTQ |
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#10 |
Ride Hard
Join Date: Oct 2000
Location: Wyoming IL
Posts: 1,094
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![]() I am not a fuel injected guru, but I would say if your fuel pressure is varying its pressure, I would chase that demon first and I bet your times follow.
Ryan
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65 Fastback 91 roller 306, H/C/I AOD-Bauman, PI Stallion, 4.10's and traction loc 04 Grand Cherokee Freedom Edition 79 Ford F-250 4x4 - Restored |
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#11 | |
Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
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![]() Quote:
I ran a 13.59 @100mph with my #4 injector unplugged I sure was happy when I figured it out and ran 12.60's @107 the next time out. ![]() *Do a compression test. *Check firing order *Check all the injector plugs *Make sure your timing is advancing 20 degrees past initial when you rev it. *Make sure you MAM is calibrated for your injectors *Check your TPS voltage *Pull the codes If it still is running slow after all that then my best guess would be that the cam is off a tooth. ![]() If you have stud mount rockers you also could have a valve too tight and have a dead cylinder. The compression check will reveal if thats the case. Good luck!!!!! ![]() BTW: What is your compression ratio.
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92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer |
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#12 |
Registered Member
Join Date: Sep 2000
Location: rock hill,S.C. 29730
Posts: 420
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![]() dang mike , see I was hoping for at least 820-8.30's as my car is kinda heavy 3330 w/me in it.
Comp ratio I guess to be around 10to1-10.25to1
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88 GT: subs,pullies, 1 3/4 longtubes, flowmasters, AFR 165's,T,F #1 cam,Thyphoon intake, 24# inj., 73mm C&L,65mmT.B., 190LPH pump, Eagle sir rods, forged pistons in a newly rebuilt 306. DYNO TUNED TO 300.97 RWHP 337RWTQ |
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#13 | |
Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
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![]() Quote:
Find a dyno. A dyno graph will tell us more than track times.
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92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer |
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#14 | |
Undescribable
Join Date: Sep 1998
Location: Ft Myers Fla
Posts: 1,539
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![]() Quote:
these times that me and dark are runnign we're using slicks and doing rev limiter launches! at least thats how i was doing it. get that thing on a dyno and lets see whats it's making then we'll see if it's the car or something else
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Rice Haters Club Member #101 |
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#15 | |
Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
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![]() Quote:
Are you missing your stang yet Mike?
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92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer |
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#16 | |
Undescribable
Join Date: Sep 1998
Location: Ft Myers Fla
Posts: 1,539
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![]() Quote:
yes i miss it. have only been back to a drag stip once since selling it...
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Rice Haters Club Member #101 |
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#17 |
Registered Member
Join Date: Sep 2000
Location: rock hill,S.C. 29730
Posts: 420
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![]() I haven't tried a compression check yet, I'll do that asap, I do have stud mount adjustable rockers, today I was messing with the fuel pressure and it seem's to pull harder at 45#'s than at 40# ?
Wouldn't a dead cylinder or a BAD intake leak make themselves VERY evident?
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88 GT: subs,pullies, 1 3/4 longtubes, flowmasters, AFR 165's,T,F #1 cam,Thyphoon intake, 24# inj., 73mm C&L,65mmT.B., 190LPH pump, Eagle sir rods, forged pistons in a newly rebuilt 306. DYNO TUNED TO 300.97 RWHP 337RWTQ |
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#18 | |
Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
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![]() Quote:
A vacuum gauge will find a vacuum leak very easily. Keep us posted.
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92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer |
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#19 |
Registered Member
Join Date: Sep 2000
Location: rock hill,S.C. 29730
Posts: 420
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![]() Ok, I still haven't had a change to do a full compression check, working all week, but I hooked my Vac guage up and at idle I'm only reading 14" , it should be around 20" right?
It' acts right when I blip the throttle and when I hold it at 2000 rpm's for 20 secs. or so and close throttle it holds at 3-4" higher for a few seconds as it should . I've been told this low a reading is probably late valve timing, does this mean the cam is off??!!??!! Or could it be a tight valve, will a compression check tell me if it is a tight valve? I'm guessing that cylinder will have a exessivly low reading? Will it matter if I do it with a cold engine or must it be up to temp? Thanks Wes
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88 GT: subs,pullies, 1 3/4 longtubes, flowmasters, AFR 165's,T,F #1 cam,Thyphoon intake, 24# inj., 73mm C&L,65mmT.B., 190LPH pump, Eagle sir rods, forged pistons in a newly rebuilt 306. DYNO TUNED TO 300.97 RWHP 337RWTQ |
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#20 | |
Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
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![]() Quote:
It wont really matter if you do the compression test cold or hot cause if you have a problem it wilkl be really obvious.
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92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer |
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